Define the 4 different layers of the TCP/IP Reference Model.
Requires listing and briefly describing the Application, Transport, Internet, and Network Access layers.
Why Interviewers Ask This
Networking models are foundational. Interviewers check if you understand the OSI alternative and the practical layering used in internet protocols.
How to Answer This Question
List the four layers: Application, Transport, Internet, and Network Interface. Briefly describe the function of each. Compare it to the OSI model if helpful. Mention key protocols associated with each layer like HTTP, TCP, IP, and Ethernet.
Key Points to Cover
- Layer names
- Function descriptions
- Key protocols
- Comparison to OSI
Sample Answer
The TCP/IP model consists of four layers: Application, which handles high-level protocols like HTTP; Transport, managing end-to-end communication via TCP or UDP; Internet, routing packets using IP; and Network Interface, handling physical transmission. This model simplifies networking by grouping functions logically for efficient data transmission.
Common Mistakes to Avoid
- Mixing up layer order
- Confusing with OSI 7 layers
- Omitting the Network Interface layer
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